Or he's just having a nightmare. He wakes up screaming and runs out of the room... into a pack of seventeen berserkers that had been there all along. Then he wakes up because that was also a dream, he had fainted while being eaten as a zombie had caught them shortly after they got out of the car. Then he wakes up because that was a dream, there are no zombies, the robots revolted against humans and he's one of the few survivors that robot scientists are keeping drugged in a lab to study how humans are built. He turns his head to the left and wakes up in terror as he sees... he forgot that part of the dream when he woke up. All he knows is that he's really seventeen years old and pregnant. He turns his head to the left and... he wakes up as Milo brushes his hair out of his face and says "hi sweety!" before being killed by a meteor then he wakes up and he's under the bed with a zombie reaching. He lets the zombie eat him because he's really fed up with it. Then he wakes up as a zombie and scream OH FUCK THIS SHIT!!! and that's how berserkers are born.